Dental instrument.



J. L. KELLY.

DENTAL INSTRUMENT.

APPLICATION FILED NOV. 27, 1909.

Patented Sept. 27, 1910.

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WITNESSES IUNI @TAS ART g rg JOHN LAWRENCE KELLY,

DENTAL INSTRUMENT.

To all whom it may concern:

Be it known that I, JOHN L. KELLY, citizen of the United States,residing at Chicago, in the county of Cool: and State of Illinois, haveinvented certain new and use ful Improvements in Dental Instruments, ofwhich the following is a specification.

My present invention relates to dental instruments and more particularlyto dental instruments devised with a view of holding pieces of wood orother suitable material for use in polishing tooth surfaces; and itconsists in the peculiar and advantageous instrument hereinafterdescribed and claimed.

In the drawings, accompanying and forming part of this specification:Figure 1 is a perspective view of the best practical embodiment of myinvention of which I am aware; the same being shown with pieces of woodsocketed in the bores. Fig. 2 is an enlarged longitudinal sectionthrough one end portion of the instrument and showing a piece of woodsecured in the tapered bore thereof. Fig. 3 is a similar view of theother end portion of the instrument, but with the wood omitted.

Similar numerals designate corresponding parts in all of the views ofthe drawings, referring to which:

1 and 2 are the opposite end portions of the instrument, and 3 is theintermediate handle portion which is integral with the said end portionsand of increased thickness in about the proportion illustrated. The endportion 1 extends at an angle from the handle portion 3 and terminatesin a head 4 in which is an inwardly tapered bore 5, and the end portion2, which is longer than the end portion 1, extends at an angle ofgreater degree from the handle portion and terminates in a head 6 inwhich is an inwardly tapered bore 7 disposed at a different angle fromthe bore 5 in head 4. Each of the bores 5 and 7 is provided at its outerend with a flared mouth 8 having a cutting edge 9, and consequently itwill be manifest that when a piece of wood or other material suitable tothe purpose is forced into either bore, the wood will be reduced andshaped and thereby caused to nicely fit the tapered bore in which itwill be firmly held, though in such manner that it may be turned in thebore when it is necessary to adjust it to better suit it to a particulartooth surface to be polished.

Specification of Letters Patent.

Application filed November 27, 1909.

OF CHICAGO, ILLINOIS.

Patented Sept. 2?, 1919.. Serial No. 530,197.

In the practical use of the instrument, pieces of wood 10 are forcedinto the bores 5 and 7, as shown in Fig. 1, and then the instrument ismanipulated by the dentist to polish the surfaces of teeth in the mouthof a patient, first one piece of wood and then the other beingmanipulated in the mouth and against a tooth as the exigencies of thecase require.

As will be observed by reference to Figs. 2 and 3 the inner ends of thebores 5 and 7 are open, and hence when necessity demands a punchinginstrument may be employed to displace the pieces of Wood subsequent touse thereof.

It will be gathered from the foregoing that my novel instrument isadapted to hold a piece of wood or other material in such position thatall parts of the tooth surface may be reached and polished with case;also, that a piece of wood pressed into either of the bores is formed tofacilitate its entry into the bore, and, because of the taper of thebore, the farther the piece is forced in, the tighter it is held,although the wood is slightly movable so that its position may bechanged in the bore with a view of enabling it to reach all sides andsurfaces of a tooth and also under the gum as is necessary frequently inthe cleaning and polishing of teeth and the treatment of diseases of theteeth and gums.

Having described my invention, what I claim and desire to secure byLetters Patent, is r A dental instrument, comprising an intermediatehandle portion, reduced end portions, of difierent lengths, extendinglaterally at different angles from the handle portions, and heads on thesaid end portions, each head having an inwardly tapered socket, open atits opposite ends, and provided with a flared mouth and a cutting edgeat its outer end; the said bores being also disposed at different anglesto the handle portion, for the purpose set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN LAWRENCE KELLY.

Witnesses:

C. E. CHRISTINE, S. M. LITTLE.

